河外星系
Present Situation on Determinations of Stellar Proper Motions with Respect to Extragalactic System
以河外星系为参考系的恒星自行测定现状
To Build Up the Inertial Coordinate System With A CCD(ⅰ) Measuring the Relative Position of An Extragalactic System with Respect to the Reference Stars
CCD用于建立惯性坐标系(Ⅰ)测定河外星系与定标星的相对位置
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